Humidity test cabinet



Sept 1,2, 1950 F. J. KOLAR, JR 2,521,921

HUMIDITY TEST CABINET Filed oct. '7, i948 I .Hillmyn #WEA/raf? EJ Kam/e, JR. 8V

Paten-ted Sept. 12, 1950 -""I"his '-"inventio'nrrelates to humidity producing apparatus and more particularly-#to va cycling humidity testcabinet for.: determiningfthe re-4 sistance fof Y specimens -entered "therein to faccelerated corrosionwhile subjected tonuctuating 5,

conditions@ 'of humidity-arid temperature.

""f'An "iobject -of` the Vinventionis the provision.' of

all simple -and practicable humidity test cabinet inlWliiclfiv specimens mayE beeic-ientlyl tested for th resistance to`V corrosion. n

n-oriei embodimentof the inventiontl'lere is providediea sealed-f cabinet having a supply vof Water'of I"a 'suitable f'depth in` theflowerV portion ofja; testi-ngfchainberfin which' an electricfheater is irnmer-se'd, *whereby vapor '-Lwilllbe Jgenerated. Also immersed in? theV water is 'l a 'thermocouple whichncayj bevv connected `-by `V'-Ineans of f controls. to theffheater* tomaintainy -thewvainersupply at a` predetermined --con`stant= temperature. y`'lnterme-V dia-teithe Water? supply fand- 'the upper Wallrof thef-'cabinet is fi a, horizontale Shelf of coiled'pipe,

throughwhich -a-coolant'fmay be periodically circulated. I-'The `1specimens lto r be tested v-\are` placed on'af perf-o ratecl-v tray, `Which 'restseon the throughl the coils', `the- `parts 'I are-chilled, causing vaportobe 'condensed thereon'. Circillatinge'fans within' the* cabinet above1the tray-y of specimens serve caus'eluniform-ity -of relative 'humidity' a'ndftemperature y-ti/it'hin the `testing chamber.;

The upper'fwall of-thecabinethas fa hinged double glass and sealed Ydoor whereby inspec' tiorfof the interior of the'cabinet and the specimens may befhadrwithout disturbing the humidity or temperature inthe-testing chamber. @Either objects; andy Jadvantages poi ,ftheL invention will be understood by referring-Etofthelffollowing detailed description when considered in conjunction With -the 'accompanying drawing, in

which? Fig. a1 :fis .fia vertical central longitudinal A,section of arhumidity testing cabinet embodying thefeaturesiof the invention, shown partly rin diagrammatic form, and l Fig. 2 is a plan View, partly in section, taken on the line 2-2 of Fig. 1.-

The humidity test cabinet of this invention, referring particularly to Fig. l, comprises a rectangular shaped casing, indicated in general at I0, providing a testing chamber II, the walls of which are constructed of any suitable material, such as Wood, sheathed inside and outside with stainless steel or other non-corrosive material, indicated at I2. In its upper wall, the cabinet is tted -With a door I3 hinged at -HUMIDITYTEST -onl1'vlrrk A Frank rJ.K 1ar,` Jr.,Chicago, 7111 Yassignorto WVestern-:Electric` Company, Incorporated, New

iYork, N. Y.,l-a corporation ,oi New York` ApplicationOctoberf7, 1948,"fSerialNo. 53,214

I 4," and@ a1 suitabler seal I 6'- sui'rounds the frames of t the door at 'its juncture 'with' the :openingfin the upper Wall vto g provide favapor-tight seal, therebetween. rg'Ilhe rdoor ,f I3 includesfa 'transf parent panel; comprising two,- spaced pairsv of;

vplate glass f II-If'I, .vfsealed finto position v-vin rthe` door, byli'neansof which the linterior ofthecabi. net and A*the contents thereof :may fbe .:readily': viewed. Attached vto thef door "I3 are hand-les which isshown inrl'ig..Y 2.

in the lower portion :ofclthe chamber- II :vis-'la waterproof electric -2 :heater I9, Whichw'extends through and is sealed in an aperture in the'- rightehand' verticalrwall ',of "thetzc'abinet-4 (Fig. :1) th'eitheater'ibeing `connected to a' suitable :sourceof felectrical fenergy, indicateduat, byi'coni-:f ductor"leads2I--2I. Afsupplypofv Water is .car-i ried inathe lower 'ip ortion of the:chambers-d'Il with the electric theater Hz-immersed rthereimy the level of the'fwater,rsupplyfbeingiindicate'diatt L 22. Also immersed in the fwatersupplyfisia thern'iocouplef23,--Which extends through andiis sealed in an aperture rv in the 'leftehand' .-wa'll for the: cabinet. 'The thermocouple 23. is operatively connected with-a thermostat 24, which isvqcone,y nected .into 1 the circuit from -the energyisource- 20 -tovy the heater :19,1 by 'conductor leads .2E-25;v whereby the heater Will befcontrolledto lmaine,1 tainl. the*Water,-.supplyV atv apredetermined, constantA temperature. Waterv inlet andV Voutlet icon-fv vided at 26, and2'I,respectively.V

Above `the Water supplywlevel .f22 With-in ith ,Y chamber: I I *anda suitably-- spaced?` from, thea:- doorl ported fro-mopposed Wal-ls'of-the cabi-net -b 5 anglefbrackets.29%29axed to suchsvvalls. 0p-1, posite endsof the -coiledpipe-iii, indicatedfat; 3 and 3l, extend i through.- andare sealedlin anI 'aperturef in a -.Wall: `of the -g cabinet, they end 3U may be connected-to a `-suitable fmotor4 driven coolant A supply f source l32 Which-serves ,ito c'irrfz culate i the-coolant through: the 1 coiled rpifpe; an the iopposi-,te fend r3 I ofiithec"coiledfpipeaisx nected to the coolant supply source for recirculation upon being cooled again. In order to periodically circulate the coolant through the shelf of coiled pipe 28, as desired for the particular test being made, an electric motor 33,

` Withinthe spirit and scope thereof;

upon the coiled pipe shelf is a readily removableperforated tray 38, preferably of aluminum for supporting parts or specimens, indicated at 49, to be tested for resistance to corrosion. Air circulating means is provided for the chamber Il in the form of electric fans 5l- 4l mounted upon opposite` end Walls of the cabinet, the rotor shafts forv the fans entending through fb'efarings4 sealed in apertures' in such Walls. The fans are effective to maintain uniformity of relative hu*- midity and temperature Within the chamber lll-- The above-described accelerated cycling -hu-L midity test cabinet is used to determine the ren sistance of parts, such as, forins'tarlceimetal piece Y parts or specimen metal plates, Whichfmay havef' been treated with a coating or nish, to'prei f fin tray for carrying parts to be tested supported in the chamber above the level of the Water supply, means in the chamber above the level of the Water supply and adjacent the tray for cooling said tray to cause condensate of the vapor to form on the parts to be tested, and air circulating means in the chamber above the tray for causing-,uniformity oijy relative humidity and temperature in the chamber. i* Y 4. A humidity test cabinet for parts comprising a vsealed chamber having a Water supply area at determined climatic conditions. 1 In use,` andasi suming that the Water supply in the chamberl'l A has first been heated sufficiently by the heater |.9 to Vproduce vapor with the thermostat 24 set to maintain thewater supply atapredetermined constant temperature andthe coolant-is being circulated periodically through the' shelf oficoiled' pipey 28 from vthe `source 32` by setting thetimerlv 34, allin accordance with the particular condi# tions desired for the test, the door I3 is opened? and a tray 38,: with the parts or specimensf fm11 toY be tested, is placed upon-the 'shelf of coiled pipe'and the door is closed. *Y During" the testing" period, which Will' vary 'in accordance withfthe'i type of tests being made.V andthe particular specimens under test,"lthespeCimensV mayI be viewed through the glass panels lill1 'of the doorl3. It isto be understood that the above-described arrangements are simply illustrative of the ap'-y plication of the principles'of-the'invention.V Nui-v merous other arrangements may bereadily'"de` vsed by thoseskilled in'the -art whichY will em" arid fallbody f. the principles Vof theinvention What is claimed is: a

'-'lI 'A humidity test cabinet comprising a lsealed. chamber ,having a Water-receiving areafin the bottom'thereof, 'a heater Aimmersed in. the' tvateii a tray'supported Within the" chamber in positionabove the level of the water,'.and means for ccnl-t; the precipitation of"mois" ing said trayto cause tureon parts in 'the tray. 1

' humidity testY cabinet for parts comprising a 'sealed chamber having; a Water" supply 'areaat tsbottom port'on,' a heater `immersed thewater .supply for generating/vapor to' produce high conditions of humidityinthe "chan'iber,` a

tray for* carrying partsto be testedV supported in the 'chamber above Ithe levelof the Water supply, andfmeans in the chamber above the level ofthe Water' supply and adjacent the tray for cooling said traynto cause condensate ofthe vapor f to form on the parts to be tested.

3." A humidity'test cabinet for parts comprls'- ing a sealed'chamber having a 'Water supplyarea at its bottom portion, a heater immersed in the Water supply forgeneratin'g vapor'` to producehigh conditions of humidity inZ the chamber, a

60 Number Name '1,870,512 Jameson Aug. 9, 1932 '1,969,606 Hau Aug. '1, 1934 2,302,224 Jones Nov. 1"?, 1942" 2,405,532

Iits-bottom portion, a heater immersed in the Water supply for generating vapor to produce "Thigh vconditions ofrhumidity in the chamber, a "traywfor'carrying parts to be tested in the chamloer; a shelf of coiled pipe in the chamber above the level `oflthe .Water supply upon which the tray is supportedthrough which a coolant is circulatedL periodically for causing condensate of the vapor to form on th'e parts to be tested peof the Vapor to form on the parts to lbe tested,

and circulating means in the chamber above the. tray for causing uniformityof relative humidityand temperature in the chamber. 1

*6. A humidity test cabinetv for parts compris-f ing a sealed chamber `having a Water supply area: at its vbottom portion, a heater immersed in the` water supply for Agenerating vapor to produce high conditions ofwhumidityin the chambeigia:

perforated tray for vcarrying parts to be tested?- in thefchamber, .a shelf of coiled pipe inthe chamber;- above lthe rvlevelf-ofthe Water supply upon-Which the tray is supported through which, acoolant iscirculated vfor causing condensate4 `of the vapor to for-my on lthe parts to be .'testecl, means for periodically circulating a coolantY through the coiled pipe, Aand air circulating fans.

in the chamber above the tray for .causing uni-.1 formity of relative humidity and'temperatureYv in the chamber.'

vREFEmmens crrnnL l 'The following references are'of .recordfin the le of this patenti'. I

UNITED STATES PATENTS I l Date" Todd s. Aug; 6,19461 FRANK-'Jil KOLAR. 

